Just find the number of columns of the given matrix.
x = [1 2
y = 2
Maby this one needs some more test suites ;)
improve test suit
Maybe more test cases here? ;-)
Swap the first and last columns
Remove all the words that end with "ain"
multiply by three
Convert yards to feet
Find the area of the four walls
Convert a number to its Roman representation
Find the square of the sum of the digits of a number
Concatenate two strings
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